Warp stop-motion for looms.



PATBNTED AUG. 8, 1905.

G. E. CHANDLER. WARP STOP MOTION FOR LOOMS.

APPLICATION FILED 1A3. 24, 1905.

W IIIIIIF UNITED STATES PATENT oEEIoE.

GEORGE E. CHANDLER, OF TAUNTON, MASSACHUSETTS, ASSIGNOR TO MASON MACHINE WORKS, OF TAUNTON, MASSACHUSETTS, A COR- PORATION OF MASSACHUSETTS.

Specification of Letters Patent.

I-atented Au fs, 1905.

Application filed March 24, 1905. Serial No. 251,756.

10 all w/tom zit may concern.-

, in Warp Stop-Motions for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like letters and figures on the drawings representing like parts.

This invention relates to warp-stop-motion mechanism for looms of the single-thread type wherein each warp-thread cooperates with a controlling-detector andv normally maintains the same inoperative, a released detector operating through suitable means to effect automatically the stoppage of the loom.

My invention in the present embodiment thereof applies more particularly to electrical warp stop-motions, the detectors serving also as circuit-closing devices cooperating with an operating electric circuit to efiect by closing of the same the release of the shipperof the loom. In devices of this character considerable trouble has been experienced in actual practice by the deposition or accumulation of lint, fluff, or the like on the surfaces which are designed to make electrical contact upon failure of a warp-thread, such deposits often preventing the operation of the apparatus altogether or so retarding it that the action is very unsatisfactory and unreliable.

My present invention has for one of its objects the production of novel and efficient means to completely shield or protect the contact portions of the warp stop-motion from the deposition of lint, &c., thereon, whereby the action of the apparatus is rendered certain, prompt, and reliable.

Another object of the invention is the construction and-arrangement of parts whereby a released detector can be instantly discovered and its position in the series of detectors located by the weaver, facilitating piecing up.

I have devised a novel form of detector in connection with the remainder of the apparatus so constructed that the warp-thread can be easily brought into cooperative relation therewith without necessitating drawing in.

The various novel features of my invention will be fully described in the subjoined specification, and particularly pointed out in the following claims.

Figure 1 is a partial transverse section of a suflicient portion of a loom to be understood with one embodiment of my present invention applied thereto, the parts being shown in normal condition. Fig. 2 is a top plan view of the shipper-releasing means and a portion of the controlling mechanism. Fig. 3 is a detail in front elevation of the shipperreleasing means. Fig. 4 is an enlarged detail of a portion of said means to be referred to; and Fig. 5, is an enlarged cross-sectional detail of the detectors, the cooperating circuitterminal, and the shield, the arrangement of the warpthreads being slightly different from that illustrated in Fig. 1.

Referring to Fig. 1., the loom-frame 1, the lay 2, breast-beam 3, having the notched plate 4 for the spring-controlled shipper 5, may be and are all of usual or well-known construction. A knock-off lever 6 is fulcrumed at its outer end at 7 on the plate 4, (see Figs. 2 and 3,) said lever having pivotally mounted thereon a dog 8, extended rearwardly above and beyond the breastbeamand normally out of the path of movement of a bunter 9, herein shown as mounted on the lay, (see Fig. 1,) the lever 6 being located behind the shipper to release the same when the lever is pushed forward, as will be described. A bracket 10, secured to the adjacent loom side below the breast-beam, supports an electromagnet 11, the armature 12 (shown in detail, Fig.4) being pivoted on the breast-beam at 13 and having an up turned finger or detent 14, adapted to extend beneath the dog 8 and normally retain it in the position shown in Figs. 1 and 2. The detent is beveled at its upper end to enable it to readily clear the dog at the proper time. A spring 15, secured to the armature, bears at its free end against a stud 16 on the breastbeam, the spring normally tending to retain the detent in its operative position. When the magnet is energized, as will be described, the armature 12 is attracted, withdrawing the detent 14 from beneath the dog 8 and permitting the latter to drop into the path of the bunter 9, so that as the lay beats up the knock-off lever 6 will release the shipper, .and thereby effect stoppage of the loom through suitable stopping means forming no part of my invention. Referring to Fig. 1, I have shown the electromagnet as included in an operating electric circuit, a battery 17 or other suitable source of electrical energy being connected by a conductor 18 with the electromagnet, the other end 19 of the wire leading. from the magnet-coils being connected electrically with one member 20 of a switchor circuit-breaker suitably insulated from the loom-frame and adapted to contact with a lug 21 on the knock-off lever (see Fig. 2) when the shipper is in running position. When the shipper is released, the circuit is broken between the two members 20 and 21 of the circuit-breaker, as said members are then operated by the outward movement of the lever 6. From the opposite side of the source of electrical energy 17 the wire or conductor 22 is attached to an elongated terminal 23, extended transversely of the loom below the warp-threads and mounted at its opposite ends on brackets 24, one of said brackets being secured to each loom side, the terminal 23 being insulated from the brackets in any suitable manner. The terminal is herein shown as rectangular in cross-section, and its lower flat face 25 constitutes the contactsurface to be engaged by one of the circuitclosing-controlling detectors, to be described. The brackets 24 are provided with seats 26 for transverse rods 27, which in the arran ement shown in F ig. 1 serve as lease-rods for the warps, and I have herein shown two metallic rods 28 as carried by the brackets 24 adjacent the terminal 23 and at thefront and rear thereof in parallelism therewith. These metallic rods 28 are in electrical connection with the circuit through the metallic brackets 24, the loom side, knock-off lever 6, and circuit-breaker 20 21, as will be manifest from an inspection of the drawings, the circuit being broken or open between the termi nal 23 and the rods 28, which latter are thus also terminals of the operating-circuit.

On each of the rods or terminals 28 I mount a series of controlling-detectors made of flat thin sheet metal, as herein shown and substantially .J-shaped. Each detector comprises an elongated straight stem 29, having a warp-eye 30, connected by a slot 31 with the edge of the stem, and a curved foot 32, having an aperture 33 to loosely receive the supporting-rod or terminal 28, as clearly shown in Figs. 1 and 5. Referring to those figures, it will be seen that the two banks or series of detectors are arranged reversely to each other and the foot of each detector is provided with a contact-shoulder 34, which normally is held below and away from the face 25 of the terminal 23. In Fig. 1 the stems of the detectors engage the warpthreads at the front and back of the crossingpoint of the two divisions of the shed, the rear bank of detectors cooperating with the threads w, while the detectors in the front bank cooperate with the threads w. So long as the warp-threads are intact the detectors are held in inoperative position, as shown but when a warp-thread fails or becomes unduly slack its detector is permitted to swing or move angularly on a support 28, as indicated by dotted lines at the left, Fig. 5, thereby bringingits contact shoulder 34 into engagement with the face 25 of the terminal 23 and completing or closing the operatingcircuit, thereby energizing the magnet and effecting shipper-release, as has been described. The construction of the detectors is such that but a small portion of their weight is sustained by the warp-threads, and by making the warp-eyes open the detectors can be applied to the warp-threads readily without necessitating drawing in of the warps thereto. The upper ends of the stems of the detectors extend some distance above the plane of the warp, as will be manifest, and when adetector is released its upper end moves out of alinement with the stems of the other detectors in that series, indicating at once to the weaver the exact position of the faulty warp-thread, so that piecing up is greatly facilitated.

The contact-face 25 of the circuit-terminal 23 being the bottom face of the terminal, it will be manifest that lint, fluff, or dust cannot collect thereon; but in order to protect or shield the contact-shoulders of the detectors, as well as the terminals 28, from deposits of lint, &c., I have provided a hood-like shield 35, connected at its ends to the brackets 24 and extended across the loom above the ter minals 23 28, the front and rear edges of the shield being downturned at 36 and of sufficient depth to extend well below the terminals 28. This great depth of the edges is per mitted by the bent or curved feet of the detectors, as will be manifest. Any lint or fluff collecting on the top of the shield will be shaken offby the vibration of the loom and sliding over the downturned edges of the shield will be shed clear of the terminals or of the contact-shoulders of the detectors, thereby at all times maintaining the contact-surfaces clear and free from foreign matter, so that a perfect and rompt closing of the operating-circuit is e acted by release of a detector.

In Fig. 5 the construction and arrangement in general is precisely such as has been heretofore described and as shown in Fig. 1, but instead of utilizing the rods 27 as'lease-rods they merely serve as warp-rests at the back and front of the two series of detectors, and between said series two other rods or war rests 37 are mounted on the brackets 24, t e sheet of warp passing over the rods 27 37, and in such case the detectors would be located between the usual lease-rods and the whip-roll of the loom.

I have herein shown and described one practical embodiment of my invention; but

the same may be modified or changed in various particulars by those skilled in the art without departing from the spirit and scope of my invention.

I-Iaving fully described my invention,what

- I claim as new, and desire to secure by Letters Patent, is

1. Inyan electrical warp stop-motion for 'looms, in combination, a series of circuitclosing detectors maintained inoperative by normal warp-threads, an operating electric circuit with which said detectors are electrically connected, an elongated terminal of said circuit extended transversely of the loom adjacent the detectors,- a released detector contacting with said terminal and closing the circuit, and a shield overhanging the terminal and the contact portions of the detectors, to prevent the collection of lint thereupon.

2. In an electrical warp stop-motion for looms, in combination, a series of circuitclosing detectors maintained inoperative by normal warp-threads, an operating electric circuit having elongated, parallel terminals extended transversely of the loom, the detectors being in continuous electrical connection with one of the terminals, a released detector contacting with the other terminal and closing the circuit, and a shield overhanging the latter terminal and the contact portions of the ,detectors.

3. In an electrical warp stop-motion for looms, in combination, a series or circuitclosing detectors maintained inoperative by normal warp-threads, an operating electric circuit having an elongated terminal extended transversely of the loom below the warp, said detectors being in continuous electrical connection with the circuit and adapt ed when released. to contact with the said terminal and close the circuit, and a shield having depending front and rear edges located above and substantially inclosing the said terminal and the contact portions of the detectors, the latter being upturned outside the edges of the shield to cooperate with the warp-threads.

4. In an electrical warp stop-motion for looms, in combination, a series of circuitclosing detectors maintained inoperative by normal warp-threads, an operating electric circuit having two parallel, elongated terminals located near each other below the warp, the detectors being pivotally mounted on one of said terminals, a released detector swinging thereon and contacting with the other terminal to close the circuit, and a shield interposed between the warp and said terminals to prevent deposition of lint there on or on the contact portions of the detectors, the free ends of the detectors projecting beyond and above the shield to cooperate with the warp-threads.

5. In an electrical warp stop-motion for said terminals and the contact-shoulders of the detectors, the free ends of the latter be ing upturned beyond the shield to cooperate with the warp-threads.

6. In an electrical warp stop-motion for looms, in combination, an operating electric circuit having a plurality of adjacent elongated terminals extended in parallelism transversely of the loom below the warp, a hood-like shield overhanging said terminals, a series of circuit-closing detectors having curved feet apertured to receive and be pivotally supported on one of the terminals in electrical contact therewith, the elongated, straight stems of the detectors extending upward outside the shield and provided with warp-eyes to receive the warp-threads, and contact-shoulders on the feet of the detectors beneath the shield, to electrically engage the under portion of the other terminal and close the. circuit when a detector is released.

7. In an electrical warp stop -motion for looms, in combination, an operating electric circuit having a plurality of adjacent elongated terminals extended in parallelism transversely of the loom below the warp, a hood-like shield overhanging said terminals, a series of circuit-closing detectors angularly movable on and supported by one of the terminals and having each a contact-shoulder to engage the other terminal and close the circuit when a detector is released, the detectors being upturned outside of the shield and having eyes to receive the warp-threads, the latter normally maintaining said detectors in inoperative position. b

8. In an electrical warp stop-motion for looms, in combination, a series of circuitclosing detectors maintained inoperative by normal warp-threads, an operating electric circuit with which said detectors are electrically connected, an elongated terminal of said circuit extended transversely of the loom adjacent the detectors, and below the warp, a released detector contacting with said terminal and closing the circuit, and means interposed between the warp and said terminal to prevent lint from dropping onto the terminal and the contact portions of the detectors, the detectors being upturned to engage the warp-threads above said means.

9. In an electrical warp stop-motion for looms, in combination, a series of circuitclosing detectors maintained inoperative by normal warp-threads, an operating electric circuit with which said detectors are electrically connected, an elongated terminal of said circuit extended transversely of the loom below the warp and having a flat lower face, each detector having a contact shoulder adapted to engage said face and close the circuit when a detector is released, and a shield overhanging the terminal and the shoulders of the detectors to prevent the deposition of lint thereon.

10. In a loom, lease-rods, a series of angularly-movable warp-stop-motion-controlling detectors cooperating with the warp-threads between the lease-rods, each detector having a curved foot and acting as a circuitcloser when released, an operating electric circuit having two parallel and adjacent terminals located beneath the warp and extended transversely of the loom, the feet of the detectors being pivotally mounted on one terminal and therethrough in continuous electrical connection with the circuit, a released detector contacting with the other terminal, and closing the circuit, and a hoodlike shield extended over said terminals and the contact portions of the detectors, to protect the, same from lint and dust, the free ends of the detectors extending upward outside the shield and having openings to receive the war -threads.

1 1. A meta lic circuit-closing detector having an elongated stem provided with a warpeye, a curved foot having an aperture to receive a transverse support, and a contactshoulder on said foot.

12. A substantially J shaped, metallic circuit-closing detector having a warp-eye in its straight stern, and provided with an aperture in its foot adjacent its end to re ceive a transverse support, and a contact shoulder on the foot.

13. A metallic circuit-closing detector having an elongated, straight stem provided with an open warp-eye, a curved foot having an aperture to receive a transverse support, and a projecting contact-shoulder on the convex edge of the foot.

14. Athin, fiat metallic circuit-closing detector having an, elongated stem provided with a warp-eye and an inclined slot leading thereto, a curved foot having near its end an aperture to receive a transverse support, and a contact-shoulder on the foot adjacent the aperture.

15. A metallic warp-stop-motioncontrolling detector having an elongated stem provided with an open warp-eye, and a curved foot having an aperture therein to loosely receive a transverse support.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE E. CHANDLER. Witnesses:

JAMES C. SPROAT, SAMUEL H. LORD. 

